Thread tensioner
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United States of America Patent
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Feb 16, 2010
Grant Date -
Oct 23, 2008
app pub date -
Sep 7, 2005
filing date -
Sep 10, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a thread tensioner comprising tensioning elements that define a thread tensioning zone. In said tensioner, the first tensioning element rests on a stop and the second tensioning element can be pressed against the first tensioning element by means of an adjustable magnet contact force produced by a magnet armature and a repelling magnet actuator. The stop is located on the opposite side of the thread tensioning zone from the first tensioning element. The first tensioning element is stressed by a spring force in the direction of the second tensioning element against the stop. Said spring force is greater in the thread tensioning zone than the respectively adjusted maximum magnetic contact force. The mass of the first tensioning element is smaller than the mass of the magnet armature.
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